Properties of Colloidal Solutions

IMPORTANT

Properties of Colloidal Solutions: Overview

This topic covers concepts, such as, Properties of Colloidal Solutions, Size of Colloidal Particles, Fixed Layer and Diffused Layer & Sedimentation Potential and Dorn Effect etc.

Important Questions on Properties of Colloidal Solutions

EASY
IMPORTANT

Choose the option that is depicting the correct match:

(i)    KCl, an electrolyte, is added to hydrated ferric oxide sol  a) Tyndall effect

(ii)   an electric current is passed through a colloidal solution   b) electrophoresis

(iii)  a beam of light is passed through a colloidal solution.      c) mutual coagulation

HARD
IMPORTANT

Consider the following statements related to colloids.

(I) Lyophobic colloids are not formed by simple mixing of dispersed phase and dispersion medium.

(II) For emulsions, both the dispersed phase and the dispersion medium are liquid.

(III) Micelles are produced by dissolving a surfactant in any solvent at any temperature.

(IV) Tyndall effect can be observed from a colloidal solution with dispersed phase having the same refractive index as that of the dispersion medium.

The option with the correct set of statements is

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An electrical potential difference will be produced between the two ends of capillary or porous plug is due to the flow of _____.

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Streaming potential is opposite to _____.

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How does the streaming potential generated?

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Streaming potential is the reverse of electro-osmosis. Justify.

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What is streaming potential?

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The Dorn effect is the reverse effect of _____.

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Sedimentation potential involves the movement of _____ in colloidal solution.

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Compare the sedimentation potential and electrophoresis.

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The Dorn effect is the reverse of electrophoresis. Justify.

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Discuss the sedimentation potential.

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The potential difference between the two layers of the colloidal solution causes _____.

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The second layer of the colloidal solution consists of _____.

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Discuss the result of the presence of fixed and mobile layers in the colloidal solution.

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Discuss the mobile layer present in the colloidal solution.

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Discuss the fixed layer present in the colloidal solution.

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At isoelectric point, the colloidal solution exist as _____.

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The colloidal solution has the zero net charge at _____.

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IMPORTANT

Compare the zwitter ion and isoelectric point.